Last update on February 8, 2023 // Source: Amazon API
Rifle Scope Product Details
SECOZOOM Rifle Scope Tactical Military 3-9 x 40mm / 3-9 x 42mm World’s Best Optical Riflescope for Hunting
This 3-9x40mm/42mm Scope is Rear (2nd) Focal Plane Reticle
It is nitrogen-filled, 100% Waterproof and Fogproof,it has very wide field of view,it’s a 3 times ratio rifle scope,can be used in all kinds of Hunting.
It’s fully multi-coated optics 30mm tube delivers superior brightness and outstanding repeatable accuracy with low dispersion ETE lenses and an illuminated Green / Red new glass etched reticle.
We are 100% sure and can guarantee this 3-9×42 model by SECOZOOM is recognized as the HIGHEST QUALITY and the MOST cost performance 3-9X40 Scopes for Hunting in the world because of its noncomparable Super Optical System!
Number of lens:11mm
Reticle: mil dot
Finish: Matte Black
Eyeguard: Soft Durometer
Structure:1 piece monoblock
Waterproofing:Mil Spec Immersion
Lens: low dispersion ETE lenses
This listing comes with 3-9×40/42mm scope +cleaning cloth+flip covers for both eyepiece and objective lens
Rifle Scope Product Features
11 lenses using proprietory lens multi-coating technology delivers better than 92% light transmission through the scope
Fully Waterproof-lenses have fore and aft O-ring Seals, fog- and shockproof construction, One piece Anodized Aluminum Main Tube
Optically flawless low dispersion ETE aspheric lenses to provide near natural vision
Impact resistance (to greater than 1000G)
Second Focal Plane Rifle scope / SFP riflescope 3-9×42 (3-9×40)
About the SECOZOOM Company
SECOZOOM is a premium supplier for rifle scopes, optics, mounts, and other add-ons used for guns like rifles and long guns. They create and build their products using materials which are long lasting and resilient. This includes the SECOZOOM Rifle Scope Tactical Military 3-9 x 40mm / 3-9 x 42mm World’s Best Optical Riflescope for Hunting by SECOZOOM. For more shooting items, visit their website.
Rifle scopes permit you to precisely aim a rifle at various targets by aligning your eye with the target at range. They accomplish this through magnifying the target by utilizing a set of lenses inside the scope. The scope’s alignment can be dialed in to account for varied environmental considerations like wind and elevation increases or decreases to make up for bullet drop.
The scope’s function is to understand exactly where the bullet will land based upon the sight picture you are viewing with the scope as you line up the scope’s crosshair or reticle with the target. Many modern rifle scopes and optics have about 11 parts which are found inside and externally on the optic. These optic pieces consist of the rifle scope’s body, lenses, windage and elevation turrets, objective focus rings, and other parts. Learn about the eleven parts of glass.
The Types of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Deciding upon the optimal type of rifle glass is based on what type of shooting you plan to do.
First Focal Plane Glass
Focal plane scopes (FFP) feature the reticle in front of the magnifying lens. This triggers the reticle to increase in size based on the level of magnification being used. The result is that the reticle measurements are the same at the magnified range as they are at the non magnified range. One tick on a mil-dot reticle at one hundred yards with no “zoom” is still the exact same tick at 100 yards by using 5x “zoom”. These kinds of scopes are useful for:
- Quick acquisition, far away kinds of shooting
- Shooting situations where computations are minimal
- Experienced shooters who understand their aim point “hold over” plus “lead” correlations for their long gun
- Shooters who do not mind the reticle is enlarged and takes up more visual eyesight area than a SFP reticle
About Second Focal Plane Scopes
Second focal plane scopes (SFP) include the reticle to the rear of the zoom lens. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick measurement would be 1/5th of the non “zoom” tick.
- Long distance styles of shooting where shooters have more time to make ballistic computations
- Shooting where most shots take place within much shorter ranges and distances
- Shooters who desire a clearer optic picture without space used up by the bigger FFP reticle
Magnification for Rifle Scopes
The extent of scope magnification you need on your glass is based on the type of shooting you choose to do. Nearly every kind of rifle glass offers some level of zoom. The quantity of magnification a scope supplies is determined by the size, density, and curves of the lenses within the rifle optic. The magnification level of the scope is the “power” of the scope. This indicates what the shooter is observing through the scope is amplified times the power element of what can generally be seen by human eyes.
Fixed Power Lens Scopes
A single power rifle scope uses a zoom number designator like 4×32. This means the magnification power of the scope is 4x power and the objective lens is 32mm. The zoom of this type of optic can not adjust since it is a fixed power scope.
Info About Adjustable Power Lens Rifle Glass
Variable power rifle scopes can be adjusted between magnification increments. These types of scopes will note the magnification level in a format such as 2-10×32. These numbers mean the magnification of the scope can be changed in between 2x and 10x power. This always involves the power levels in-between 2 and 10. The power adaptation is accomplished by applying the power ring part of the scope near the back of the scope by the eye bell piece.
Rifle Optic Power Level and Range Correlation
Here are some suggested scope powers and the ranges where they can be successfully used. High power glass will not be as useful as lower powered glass due to the fact that too much magnification can be a bad thing. The same idea relates to longer distances where the shooter needs to have sufficient power to see exactly where to properly aim the rifle at the target.
Lens Covering for Glass
All modern-day rifle optic lenses are covered. Lens covering is a vital element of a rifle system when thinking about high end rifle optics and scope systems.
Info on Lens Coatings – HD Versus ED
Some optic makers additionally use “HD” or high-definition lense finishings that make the most of different procedures, aspects, compounds, and polarizations to extract different colors and viewable target visibility through lenses. This HD finishing is normally used with more costly, high density lens glass which decreases light’s capability to refract through the lens glass. Some scope manufacturers use “HD” to describe “ED” indicating extra-low dispersion glass. ED handles how colors are presented on the chroma spectrum and the chromatic aberration or difference which is also called color distortion or fringing. Chromatic aberration is often obvious over things with well defined shapes as light hits the object from particular angles.
Single Coating Versus Multi-Coating
Different optic lenses can likewise have various finishings used to them. All lenses normally have at least some type of treatment or covering used to them prior to being used in a rifle scope or optic.
Single layered lenses have a treatment applied to them which is generally a protective and enhancing multi-purpose treatment. This lens treatment can safeguard the lens from scratches while lowering glare and other less advantageous things experienced in the shooting environment while sighting in with the optic. The quality of a single layered lens depends upon the scope maker and the amount you spent on it. Both the make and cost are indications of the lens quality.
Some scope manufacturers similarly make it a point to define if their optic lenses are coated or “multi” coated. Being “much better” depends on the maker’s lens treatment innovation and the quality of products used in constructing the rifle scope.
Anti-water Lens Finishes
Water on a lens doesn’t help with preserving a clear sight picture through a scope at all. Lots of top of the line and military grade scope companies will coat their lenses with a hydrophilic or hydrophobic finishing which is water repellent.
Rifle Optic Installing Choices
Mounting approaches for scopes come in a couple of choices. There are the standard scope rings which are individually installed to the optic and one-piece scope mounts which cradle the scope. These different kinds of mounts also usually can be found in quick release versions which use manual levers which enable rifle shooters to quickly mount and remove the optics.
Hex Key Optic Rings
Normal, clamp design mounting scope rings use hex head screws to mount to the flattop style Picatinny scope installation rails on rifles. These types of scope mounts use a couple of separate rings to support the optic, and are made from 7075 T6 billet aluminum which is created for long range accuracy shooting. This type of scope mount is wonderful for rifles which require a resilient, rock solid mounting solution which will not move no matter how much the scope is moved or abuse the rifle takes.
Quick-Release Cantilever Rifle Glass Ring Mounts
These types of quick-release rifle scope mounts can be used to quickly detach a scope and connect it to a different rifle. Numerous scopes can also be swapped out if they all use a similar style mount. These types of mounts are convenient for long guns which are carried a lot, to remove the optic from the rifle for protecting the scope, or for scopes which are used between multiple rifles or are situationally focused.
Sealing and Gas Purging for Optic Tubes
Wetness inside your rifle optic can wreck a day on the range and your costly optic by causing fogging and making residue within the scope’s tube. Many scopes protect against moisture from entering the optical tube with a series of sealing O-rings which are waterproof. Typically, these optics can be immersed within 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be ample wetness avoidance for conventional use rifles, unless you plan on taking your rifle on boats and are concerned about the optic still working if it is submerged in water and you can still find the firearm.
Scope Gas Purging
Another element of preventing the accumulation of wetness within the rifle scope’s tube is filling the tube with a gas like nitrogen. Since this space is currently occupied by the gas, the glass is less affected by temperature alterations and pressure variations from the outside environment which might potentially enable water vapor to leak in around the seals to fill the void which would otherwise exist. These are good qualities of a decent rifle scope to seek out.